Conductive vs. Dissipative Floors

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Following our post on how to make sure that your ESD Flooring is working properly, we thought today would be a good opportunity to talk about the difference between conductive and dissipative flooring.

Let’s first define what “conductive” and “dissipative” is:

  • Electrostatic conductive materials have a resistance to ground (RG) of greater than 1 x 103 ohm but less than 1 x 105 ohm. A “Conductive ESD Floor” is defined by IEC 61340-4-1 (the flooring standard) as a floor that measures less than 1 x 106 ohm (RG).
  • Electrostatic dissipative materials have a resistance to ground (RG) of greater than 1 x 105 ohm but less than 1 x 1012 ohm.

So now we’ve clarified that, you’re probably dying to know what type of flooring you should be using… So here it goes: If you use ESD flooring for a person/footwear/flooring personnel grounding system, we recommend conductive flooring.

Person/Footwear/Flooring Personnel Grounding SystemPerson/Footwear/Flooring Personnel Grounding System

Want to know why? Easy!
EN 61340-5-1 requires ESD flooring to be less than 1 x 109 ohms (RG). The same standard requires a person/footwear/flooring to be less than 3,5 x 10 7 ohms (resistance in series of operator plus footwear plus floor). Remember that floors get dirty which can raise floor resistance. Therefore it is good to start off with a floor that is conductive (less than 1 x 106 ohm). So even if the resistance increases, you’re within the required limits of the ESD Standard.

Make sure you check our Floor Mat Selection Chart.

“For standing operations, personnel can be grounded via a wrist strap system or by a flooring-footwear system”. [EN 61340-5-1 clause 5.3.2 Personnel grounding]
“When the use of a wrist strap system is impractical, the [ESD] floor and [ESD] footwear shall be the primary means of ESD control.” [EN 61340-5-1 clause 5.5 EPA working practices]


About Vermason

Vermason is a manufacturer of ESD protection products and was founded in Letchworth in 1979. Our mission is to maintain our position as the primary ESD solutions provider for the electronics industry in Europe. Vermason strive to manufacture quality ESD Control products with innovation, leadership and partnerships which deliver long term commercial benefits. We understand the many challenges our customers face regarding quality and reliability. We support these requirements with products and services of exceptional value which help them gain competitive advantages in their markets. We also appreciate that the control of ESD is one of many necessary links in a long chain required to bring a customer’s project to a successful completion. We endeavour to make that happen. We sustain our vision and mission by constantly seeking renewal via continuous education, application of new technologies and good business practices. Employees are expected to serve the customer with the highest level of technical knowledge in the industry.

Posted on 2016-02-05, in Uncategorized. Bookmark the permalink. 1 Comment.

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